" "Seeing the game on top, I felt amazing," Nguyen recalls. Like everyone else, he was shocked by its meteoric rise – and the avalanche of money that would be wired into his bank account. Even with Apple and Google's 30 percent take, Nguyen estimated he was clearing $50,000 a day. Before long, Shuriken Block and a new game he had submitted called Super Ball Juggling joined Flappy Bird in the Top 10. But other than buying a new Mac, and taking his buddies out for rice wine and chicken hot pot, Nguyen wasn't much for indulging. "I couldn't be too happy," he says quietly. "I don't know why." Remarkably, he hadn't yet even bothered to tell his parents, with whom he lived. "My parents don't understand games," he explains.

As news hit of how much money Nguyen was making, his face appeared in the Vietnamese papers and on TV, which was how his mom and dad first learned their son had made the game. The local paparazzi soon besieged his parents' house, and he couldn't go out unnoticed. While this might seem a small price to pay for such fame and fortune, for Nguyen the attention felt suffocating. "It is something I never want," he tweeted. "Please give me peace."

But the hardest thing of all, he says, was something else entirely. He hands me his iPhone so that I can scroll through some messages he's saved. One is from a woman chastising him for "distracting the children of the world." Another laments that "13 kids at my school broke their phones because of your game, and they still play it cause it's addicting like crack." Nguyen tells me of e-mails from workers who had lost their jobs, a mother who had stopped talking to her kids. "At first I thought they were just joking," he says, "but I realize they really hurt themselves." Nguyen – who says he botched tests in high school because he was playing too much Counter-Strike – genuinely took them to heart."